JP5505625B2 - Strength aids - Google Patents

Description

  The present invention relates to a muscular strength assisting device worn by a person who performs, for example, farm work or care work.

  Farmers aiming for highly profitable agricultural management are making efforts to increase the added value of crops through detailed manual work. In today's declining birthrate and aging population, there is a strong demand for the expansion of caregivers. By the way, farm work and care operation by manual work are often performed in a middle waist and a forward bending posture, and the work in such a posture places an excessive burden on muscles such as a shoulder portion, a waist portion, a knee portion or a neck portion.

  In order to reduce the strain on muscles in such farm work or care operation, the present inventors, as shown in FIG. 21, hang a stretchable belt from the shoulder to the thigh and tighten around the waist. As shown in FIG. 22, a waist muscle strength assisting device having a waist belt (see Patent Document 1) and a rubber belt extending from the shoulder are expanded and contracted by an electric wire winder via a wire connected to the tip thereof. A muscle force assisting device (see Patent Document 2) was developed and proposed.

Japanese Patent Application No. 2009-145540 (specifications and drawings) Japanese Patent No. 4345025

  However, all of the above-mentioned muscle strength assisting devices use the tension force of the belt, so they are effective for work in a forward bending posture, but the posture in which the upper body is inclined to the side, the posture in which the upper body is rotated, and the upper body is turned upside down In any work with a warped posture or a posture in which the arm is lifted, the tensile force of the belt cannot be used, and it may not always be effective.

  Therefore, the object of the present invention is not only forward bending, but also, for example, in any posture in which the upper body is tilted, rotated, warped on the back, or the arm is lifted, the burden on the muscles is effective. The object is to provide a muscle strength assisting device that can be reduced.

  In order to solve the above problems, the muscular strength assisting device according to the present invention is characterized in that it exhibits a restoring force not only in the extending direction but also in the contracting direction and the bending direction. That is, the muscle strength assisting device according to the present invention is mounted on the surface of the human body between two places where the distance changes depending on the movement of the human body, and each of the outer pipe made of a material having elasticity in the bending direction, and the outer pipe A rod-like inner member inserted slidably into the pipe and an elastic member connected to the outer pipe and the inner member are provided. The elastic member generates a tensile force or a compressive force opposite to the direction of the movement when the inner member moves in a direction of exiting from the outer pipe or a direction of entering the outer pipe. The leading end portion of the pipe and the leading end portion of the inner member are locked at the two positions via locking tools provided on the surface of the human body, respectively.

  By the way, in the state in which the tip portions of the outer pipe and the inner member are both swingably locked to the locking tool, for example, when the upper body is inclined or twisted to the side, There may be a case in which no bending force is generated between the outer pipe and the inner member simply by shifting the positions parallel to each other. Accordingly, it is desirable that at least one of the locking tools provided at the two locations is to restrain the tip portions of the outer pipe and the inner member not only in the axial direction but also in the falling direction.

  Further, during the work or after the completion, there may be a need for a posture in which the interval between the two locking tools is excessively large or small. In such a case, it may happen that the expansion and contraction lengths and bending limits of the outer pipe and the inner member are exceeded, and such a posture cannot be taken. Therefore, any one of the locking tools provided at the two locations is configured such that when an axial force or bending force exceeding a preset value is applied to the outer pipe or the inner member, It is provided with a moving means for moving the tip portion of the pipe or the inner member in the axial direction or the tilting direction, and the moving means is means for utilizing a frictional force or a spring force acting on the tip portion or the locking tool. More desirable.

  Either one of the locking tools provided at the two locations has an electric motor that moves the distal end portion of the outer pipe or the inner member in the axial direction and the tilting direction, and further expands and contracts the surface of the human body. A sensor for measurement, a control device, and a power source for supplying electric power to the electric motor, the sensor, and the control device are provided, and the control device controls driving of the electric motor based on a signal from the sensor. It can also be configured as follows.

  In the muscular strength assisting device according to the present invention, the inner member is divided into two parts, each is slidably inserted from both ends of the outer pipe, and the two inner members are connected to each other by an elastic member. May be. That is, this muscle strength assisting device is to be worn between two places where the distance changes due to the movement of the human body on the surface of the human body, and each of the outer pipe made of a material having elasticity in the bending direction and the outer pipe. Two rod-like inner members inserted slidably and an elastic member for connecting the two rod-like inner members to each other are provided. The elastic member generates a tensile force or a compressive force opposite to the moving direction when the two rod-shaped inner members move in the axial direction and away from or approach each other. Both tip portions of the two rod-like inner members are locked at the two positions via locking tools provided on the surface of the human body.

  Here, the two inner members may be connected to the outer pipe by two elastic members, respectively. In other words, this muscle strength assisting device is to be mounted between two places where the distance changes depending on the movement of the human body on the surface of the human body, and is slid onto the outer pipe made of a material having elasticity in the bending direction. Two rod-shaped inner members inserted movably and an elastic member for connecting the two rod-shaped inner members to the outer pipe are provided. The elastic member generates a tensile force or a compressive force opposite to the moving direction when the two rod-shaped inner members move in the axial direction and away from or approach each other. Both tip portions of the two rod-like inner members are locked at the two positions via locking tools provided on the surface of the human body.

  The outer pipe and the inner member are preferably formed of fiber reinforced plastic, and the elastic member is preferably formed of a tube made of a rubber material.

  The two positions on the surface of the human body are preferably either the back and the back of the thigh, the top and bottom of the knee, the back and shoulder of the head, or the upper arm and the waist.

  Here, the number of “things to be mounted between two places” is not limited to one, but includes two or more cases. The “material having elasticity in the bending direction” corresponds to, for example, synthetic resin, fiber reinforced plastic, or metal such as spring steel, piano wire, or shape memory alloy. The cross-sectional shapes of the “outer pipe” and “inner member” are not limited to a circle, but also include an ellipse or a polygon. The “inner member” is not limited to a solid one but also includes a hollow pipe. “Connecting to the outer pipe and the inner member” is not limited to connecting to the outer end portion of the outer pipe and the inner member, but is performed between the ends of the outer pipe and the ends of the inner member. This includes cases where they are connected to the middle positions.

  The “elastic member” is, for example, natural or synthetic rubber and is a tube or band surrounding the periphery of the “outer pipe” and “inner member”, or a metal spring, and is folded in a coil or zigzag shape. A flat plate spring is applicable. The wire rod cross-sectional shape of the coiled spring may be circular or polygonal. “Attachment provided on the surface of the human body” means, for example, body suits, jackets, suspenders and belts worn on the chest and back, waist belts, leg belts, arm belts, head caps It is a part, and means all the parts that lock the “outer pipe” and “inner member” with the tip portion.

  The “falling direction” means a direction in which the “outer pipe” or the like swings around the “locking tool”. “Restraining in the axial direction and the falling direction” means, for example, that a cylindrical locking device made of cloth, leather, synthetic resin, or metal is joined to a body suit or the like, Insert the tip of one of the “outer pipe” or “inner member” and connect the tip to the body suit or the like with a sharp eye or the like. For example, it may be fixed directly to a body suit or the like.

  “Means using frictional force” means “tip portion” such as “outer pipe” and “locking tool”, or “locking tool” and waist belt, etc. can move to each other. It means locking by a predetermined frictional force. “Means using spring force” means that “tip portion” such as “outer pipe” and “locking tool” or “locking tool” and waist belt can be moved to each other. It means locking by a ratchet or the like that is attached and detached by a predetermined spring force.

  “Fiber reinforced plastic” means, for example, a synthetic resin mixed with metal fibers such as carbon fiber, glass fiber, aramid fiber, silicon carbide fiber, boron fiber, whisker, or aluminum, or a cloth or sheet made of these fibers. Means a material hardened with synthetic resin. Examples of the synthetic resin include thermoplastic resins such as polypropylene and polyamide, or thermosetting resins such as epoxy resin, unsaturated polyester resin, and epoxy acrylate.

  The muscle strength assisting device according to the present invention can exhibit restoring force not only in the stretching direction but also in the shrinking direction and the bending direction, so that not only forward bending but also, for example, tilting the upper body to the side, twisting, In any posture that warps or lifts an arm, the burden on muscles and the like can be effectively reduced.

  In at least one of the locking tools provided at the two positions, the distal end portions of the outer pipe and the inner member are restrained in the axial direction and the tilting direction, respectively, thereby effectively generating a bending force in the muscle strength assisting tool. Can do.

  By providing a moving means for moving the distal end portion of the outer pipe or the inner member in the axial direction or the tilting direction in any one of the locking tools provided at two places, these outer portions can be provided during or after the operation. It is possible to take a posture that exceeds the expansion and contraction length and bending limit of the pipe and the inner member.

  Based on the signal from the sensor that measures the expansion and contraction of the surface of the human body, the tip of the outer pipe or the inner member that is locked to one of the two locking tools provided in the two directions is axially and tilted by the electric motor. By moving in the direction, it is possible to finely adjust the stretching force and bending force with respect to the user's body shape, muscle strength, work load, posture and posture change speed, etc. The burden can be reduced.

  By dividing the inner member slidably inserted into the outer pipe into two parts, the bending elastic moduli of the two inner members can be made different. Therefore, it is possible to further finely adjust the bending elastic modulus of the entire muscle force assisting tool.

  By connecting the inner member divided into two parts to the outer pipe by two elastic members, the elastic modulus of the two elastic members can be made different. Therefore, it is possible to finely adjust not only the overall bending elastic modulus of the muscular strength assisting tool but also the axial elastic modulus.

  By forming the outer pipe and the inner member with fiber reinforced plastics and forming the elastic member with a tube made of a rubber material, the muscle strength assisting device can be reduced in size and weight and easily assembled. Can do.

It is a partial cross section figure of a muscular strength auxiliary tool. It is a partial cross section figure of the muscular strength auxiliary tool of the state where it extended. It is a partial cross section figure of the muscular strength auxiliary tool of the bent state. It is an expanded sectional view of the connection part of an elastic member. It is a partial cross section figure of other muscular strength auxiliary tools. It is a partial cross section figure of other muscular strength auxiliary tools. It is a partial cross section figure of other muscular strength auxiliary tools in the state where it extended. It is sectional drawing of another muscular strength auxiliary tool. It is sectional drawing of another muscular strength auxiliary tool. It is sectional drawing of another muscular strength auxiliary tool. It is a rear view when mounted between the back and the thigh. It is a side view when wearing between the back and thighs and taking a forward bending posture. It is a rear view when it wears between a back and a thigh and takes the side bending posture. It is a rear view when it wears between the back and thighs and twists the upper body. It is an enlarged view of a locking tool. It is a side view when mounted between the above knee and below the knee. It is a back surface and a side view when mounting | wearing between a head part and a shoulder part. It is a side view when it mounts | wears between an upper arm part and a waist | hip | lumbar part. It is an enlarged view of another locking tool. It is an enlarged view of another locking tool. It is a schematic diagram of the lower back muscle strength auxiliary tool by a conventional example. It is a schematic diagram of the muscular strength assistance apparatus by a prior art example.

  With reference to FIGS. 1-20, the structure and effect | action of the muscular strength assistance tool by this invention are demonstrated. As shown in FIG. 1, the muscular strength assisting device 1 according to the present invention is slidably inserted into an outer pipe 11 made of fiber-reinforced plastic using carbon fibers having elasticity in the bending direction, and the outer pipe. A solid rod-shaped inner member 12 and an elastic member 13 made of a silicon rubber material connected to the outer pipe and the inner member are provided.

  The elastic member 13 is formed in a tube shape, and the outer pipe 11 and the inner member 12 are inserted inside the elastic member. Further, both end portions of the elastic member 13 are connected to the tip portions of the outer pipe 11 and the inner member 12 via connecting members 14 and 15, respectively. The details of the connecting members 14 and 15 will be described later with reference to FIGS.

  FIG. 2 shows a state in which the connecting members 14 and 15 provided at both tip portions of the muscular strength assisting tool 1 are pulled in the axial direction as indicated by arrows. That is, when the muscle strength assisting tool 1 is pulled in the axial direction, the rod-shaped inner member 12 extends while sliding from the outer pipe 11, and at the same time, the tube-shaped elastic member 13 extends in the axial direction. Therefore, in this state, the elastic member 13 is in a tensioned state, and a restoring force is generated to reduce the distance between the tip portions of the outer pipe 11 and the inner member 12 to the state shown in FIG.

  FIG. 3 shows a state in which the above-described muscular strength assisting tool 1 is bent as shown by an arrow. That is, when the muscular strength assisting tool 1 is bent, the elastic outer pipe 11 and the inner member 12 inserted into the elastic pipe 11 are bent to restore the straight state shown in FIG. 1 to these members. Force is generated.

  FIG. 4 shows an example of a structure in which the elastic member 13 is connected to the distal end portion of the inner member 12 of the muscular strength assisting tool 1 via the connecting member 15. The connecting member 15 forms a flat plate portion 15b by flattening the tip side portion of a cylinder made of synthetic resin, and an opening hole 15c is provided in the flat plate portion. Further, an opening hole 15d in which a female screw is screwed is formed at the center of the rear portion. A male screw that is screwed into the female screw formed in the above-described opening hole 15d is screwed at the distal end portion of the inner member 12, and a flange member 12a having an outer diameter substantially equal to that of the connecting member 15 is provided at the root of the male screw. Is screwed in.

  An opening hole having a diameter substantially equal to the outer diameter of the inner member 12 is provided at the distal end portion of the tube-shaped elastic member 13, and this opening hole is formed on the male screw provided at the distal end portion of the inner member 12 described above. Has been inserted. Then, by screwing a female screw formed in the opening hole 15d of the connecting member 15 into a male screw provided at the front end portion of the inner member 12, the front end portion of the elastic member 13 is connected to the rear end surface of the connecting member and the flange member 12a. The elastic member is connected to the front end portion of the inner member.

  FIG. 5 shows another structure in which the outer pipe and the inner member are connected by an elastic member. The parts or parts equivalent to those shown in FIG. 4 are numbered by adding 100 uniformly to the part numbers shown in FIG. 4 for the convenience of reference (hereinafter, FIG. 6, FIG. 7, FIG. 8, 9, 10, 11 to 14, 15, 16, 17, 18 to 19, and 20 are similarly numbered by adding 200 and 300 to 1200 in a similar manner. In the muscular strength assisting tool 101 shown in FIG. 5, both end portions of the tubular elastic member 113 are substantially centered in the length direction of the outer pipe 111 and the inner member 112 by fastening bands 114e and 115e made of a synthetic resin material, respectively. It is fixed to the part.

  The outer pipe 111 and the inner member 112 are made of the same material as that described in FIG. 1, and the tip portion of the inner member and the connecting member 115 are connected with the same structure as that described in FIG. It is. Further, the outer pipe 111 tip portion and the connecting member 114 are provided with a cylindrical portion 114a provided with a male screw at the rear end portion of the connecting member, and this cylindrical portion is provided on the inner diameter surface of the outer pipe 111 tip portion. Screw into the female screw and connect.

  FIG. 6 shows another embodiment of the muscle strength assisting device. That is, the muscle force assisting tool 201 is different from the muscle force assisting tool 1 shown in FIG. 1 only in the elastic member 213, and the remaining outer pipe 211 and inner member 212 are the same. That is, the elastic member 213 is formed of a stainless steel coil spring, and the outer pipe 211 and the inner member 212 are inserted into the inner diameter of the coil spring.

  Both end portions of the coil spring forming the elastic member 213 are welded to flange portions 214a and 215a of metal connecting members 214 and 215 respectively connected to both end portions of the outer pipe 211 and the inner member 212. Are combined. Therefore, when the connecting members 214 and 215 are pulled in the axial direction, the elastic member 213 formed of a coil spring is extended, and a restoring force for returning to the original length is generated by the elastic member.

  A muscle force assisting tool 301 shown in FIG. 7 is obtained by connecting elastic member elastic members 313 formed of coil springs similar to those described above in a state where the inner member 312 is pulled from the outer pipe 311 by a predetermined length. A metallic ring in which one end portion of the elastic member is not connected to the front end portion of the outer pipe, but is connected to a predetermined longitudinal position, that is, a position near the open end of the outer pipe. It is welded to the member 314a. Therefore, in such an elastic member 313, an axial restoring force is generated in both directions when the axial member is pulled and when the elastic member 313 is contracted.

  FIG. 8 shows the inner member of the muscle strength assisting device shown in FIG. 1 divided into two parts. That is, the muscular strength assisting tool 401 includes an outer pipe 411, two rod-like inner members 412 and 412 that are slidably inserted into the outer pipe, and an elastic member that interconnects the two rod-like inner members. A member 413 is provided. Accordingly, the elastic member 413 generates a tensile force opposite to the direction of movement when the two rod-shaped inner members 412 and 412 move in the axial direction and away from each other. If the elastic member 413 is made of a stainless steel coil spring as shown in FIG. 7, when the two rod-shaped inner members 412 and 412 move in the axial direction and approach each other, Generates a compressive force opposite to the direction of movement.

  By dividing the inner member 412 into two in this way, the bending elastic modulus of the inner member can be made different. Therefore, the distribution of the bending elastic modulus along the axial direction of the muscle force assisting device 401 can be changed. It becomes possible. Therefore, the muscular strength assisting device having a more appropriate bending elastic modulus can be used for each part of the human body to which the muscular strength assisting device 401 is attached.

  Further, if the inner members 412 and 412 are divided into two parts with different lengths, the bending elastic modulus of the muscle force assisting tool 401 can be further finely adjusted along the length direction of the muscle force assisting tool. That is, the portion where the inner member 412 and the outer pipe 411 overlap is the sum of the elastic moduli of the two, but is the middle of the two inner members 412, 412 and the inner pipe 411 is hollow. Becomes the elastic modulus of the outer pipe alone. Therefore, if the inner members 412 and 412 are divided into two parts with different lengths, the position where the outer pipe 411 becomes hollow changes from the axial center position of the outer pipe. It becomes possible to change the part which becomes to an axial direction from a center position.

  FIG. 9 shows the muscular strength assisting device shown in FIG. 8 in which an elastic member 513 is connected to the outer periphery of the outer pipe 511 by a synthetic resin fastening band 514e. By connecting the elastic member 513 and the outer pipe 511 in this way, the relative axial position of the outer pipe with respect to the inner members 512 and 512 can be stabilized.

  The muscle strength assisting device 601 shown in FIG. 10 is obtained by dividing the inner member 612 and the elastic member 613 into two parts, and connecting the two divided inner members to the outer pipe 611 by the two divided elastic members. It is. Here, the elastic member 613 is fixed to the outer periphery of the inner member 612 and the outer pipe 611 by fastening bands 615e and 614e, respectively. The lengths of the elastic members 613 and 613 can be easily made different from each other. Moreover, it is also possible to easily connect the distal end portions of the elastic members 613 and 613 to the distal end portions of the inner members 612 and 612 via the coupling members as shown in FIG.

  FIG. 11 shows a case where two muscle strength assisting devices 701 equivalent to those shown in FIG. 5 are mounted at two locations on the back and the back of the thigh. Both end portions of the muscle strength assisting tool 701 are connected to a chest circumference belt 704 and a thigh circumference belt 705 via locking tools 702 and 702, respectively. Further, the chest belt 704 and the thigh belt 705 are sewn on the surface of the body suit 703.

  12, 13, and 14 show the forward bending posture in which the upper body is inclined forward, the lateral bending posture in which the upper body is inclined to the side, and the upper body in the state where the muscle strength assisting device 701 shown in FIG. 11 is attached. The case where the twisted twisted posture was taken is shown. That is, in the forward bending posture shown in FIG. 12, the strength assisting tool 701 is pulled and bent along the surface of the buttocks from the back, so that the restoring force in the axial direction and the bending direction of the strength assisting tool The burden on the muscular strength is reduced. Further, in the lateral bending posture shown in FIG. 13, the strength assisting tool 701 is pulled and bent sideways, so that the restoring force in the axial direction and the bending direction of the strength assisting tool places a burden on the muscle strength applied to the back and waist. It is reduced. Further, even in the twisting posture shown in FIG. 14, the strength assisting tool 701 is pulled and bent sideways, so that the muscle force applied to the back and waist is reduced by the restoring force in the axial direction and the bending direction of the strength assisting tool. Is done.

  FIG. 15 shows an example of a detailed structure of a locking tool that locks the distal end portion of the muscle strength assisting tool, similar to that shown in FIGS. That is, the locking tool 802 has a vertically long pocket shape made of a cloth or leather member. That is, the locking device 802 has a vertically long tubular portion 823 and a peripheral portion 822 surrounding the periphery of the tubular portion, and this peripheral portion is sewn to a chest band 804 made of stretchable fibers. Attached. In addition, the vertically long cylindrical portion 823 is inserted with a distal end portion of the muscle strength assisting device 801 and a connecting member 815 connected thereto, and an opening hole 815c provided in a flat plate portion 815b formed at the distal end portion of the connecting member. , Is fixed to the band 804 around the chest by the eyes 821.

  In this way, by inserting and locking the distal end portion of the muscle strength assisting device 801 in the vertically long pocket-shaped locking device 802, the distal end portion of the muscle strength assisting device is restrained not only in the axial direction but also in the fall direction. can do. Therefore, when the locking tool 802 is tilted to the side by taking a lateral bending posture or a twisting posture, the distal end portion of the muscle strength assisting device 801 is restrained in the tilting direction by the locking device, so that the muscle strength assisting device Is bent, thereby generating a restoring force in the bending direction.

  FIG. 16 shows a case where a muscle strength assisting device 901 equivalent to that shown in FIG. 5 is mounted between the upper and lower portions of the left and right knees. Note that both end portions of the muscle strength assisting tool 901 are inserted and locked in locking tools 902 equivalent to those shown in FIG. The two locking tools 902 and 902 are sewn to a waist belt 906 and a knee belt 905 provided on the body suit 903, respectively.

  As shown in FIG. 16 (B), when the knee is bent, the strength assisting device 901 is pulled and bent along the surface of the knee, so that both the axial direction and the bending direction of the strength assisting device are obtained. A restoring force is generated, and the burden on the lower body, particularly the muscle strength around the knee, can be reduced.

  FIG. 17 shows a case where two muscle strength assisting devices 1001 equivalent to those shown in FIG. 7 are mounted between two portions of the back side of the head and the shoulder. Both end portions of the muscle strength assisting device 1001 are connected to the head-around belt 1007 and the chest-around belt 1004 via locking devices 1002 and 1002 that are equivalent to those described above, respectively. The head circumference belt 1007 and the chest circumference belt 1004 are sewn to a cloth head cap 1006 and an upper body suit 1003, respectively.

  As shown in FIG. 7, the muscular strength assisting tool 1001 shown in FIG. 17 exhibits a restoring force not only in the tension direction but also in the compression direction and the bending direction because the elastic member is formed of a coiled spring. Therefore, in any of the state where the head is bald, the state where the head is turned upside down, the state where the head is tilted to the left and right, and the state where the head is rotated, the restoring force to return to this state is exhibited.

  FIG. 18 shows a case where muscle strength assisting devices 1101 equivalent to those shown in FIG. 7 are respectively mounted between the lower portions of the left and right upper arms and the two sides of the waist. Both end portions of the muscle strength assisting tool 1101 are connected to the upper arm belt 1109 and the waist belt 1108 via the locking devices 1102 and 1102, respectively. The upper arm belt 1109 and the waist belt 1108 are sewn to the body suit 1103.

  As shown in FIG. 7, the muscular strength assisting tool 1101 shown in FIG. 18 exhibits a restoring force not only in the tension direction but also in the compression direction and the bending direction because the elastic member is formed of a coiled spring. Therefore, in any of the state where the upper arm portion is raised upward, the state where it is lowered downward, the state where it is tilted to the left and right, and the state where it is shaken to the left and right, the restoring force to return to this state is exhibited.

  By the way, for example, as shown in FIG. 18, when the muscle strength assisting tool 1101 is worn, if the upper arm portion is lowered, the distance between the upper arm portion and the two sides of the waist portion is shortened. It may happen that the tool shrinks or exceeds the bending limit. Therefore, there is a possibility that it is difficult to sufficiently lower the upper arm part downward during the work or during interruption, or the strength assisting tool 1101 may be damaged. Therefore, as shown in FIG. 19, the locking tool 1102 provided on both sides of the waist part has an outer pipe 1111 locked to the locking tool when an axial force or bending force exceeding a preset value is applied. The moving part which moves the front-end | tip part of this to an axial direction or a fall direction is provided.

  The moving means for moving in the axial direction uses a frictional force acting between a cylinder portion 1124 provided in the locking tool 1102 and the tip of the outer pipe 1111 inserted into the cylinder portion. Is set so that the tip of the outer pipe slides in the axial direction with respect to the cylinder portion when a predetermined axial force is applied. It should be noted that a tightening bolt 1125 may be provided in the cylinder portion 1124 to adjust the frictional force acting between the front end portion of the outer pipe 1111.

  Further, the moving means for moving in the tilting direction uses a ratchet mechanism 1126 provided on the locking device 1102, and a rotatable spur gear (not shown) with respect to the waist belt and a claw pressed against the spur gear by a spring. And. When a swinging force exceeding a preset value is applied to the distal end portion of the outer pipe 1111, the claw that stops the rotation of the spur gear is released to rotate the locking tool 1102, thereby causing the strength assisting tool 1101 to fall. Rocks.

  The locking tool 1202 shown in FIG. 20 has an electric motor that moves the distal end portion of the outer pipe 1211 in the axial direction and the falling direction. That is, the electric motor to be moved in the axial direction is a linear motor having a piston portion 1229 provided at the distal end portion of the outer pipe 1211 and a cylinder portion 1228 into which the piston portion is inserted. Permanent magnets are arranged in the axial direction, and an electric coil for moving the piston portion in the axial direction is wound around the cylinder portion. The electric motor that moves in the tilting direction is a step motor 1227 that rotates the locking member 1202, and is attached to the waist belt 1208. In addition, a sensor A comprising a strain gauge arranged in two rows in the vertical direction is attached to the center position of the waist on the surface of the body suit 1203 or the surface of the skin, and a battery is mounted on the waist belt 1208. The control device B is provided.

  Therefore, for example, when taking the forward bending posture, the length of the two rows of sensors A changes and the resistance value changes. Based on the change in resistance value, the control device B drives the linear motor described above to The tip portion of the pipe 1211 is moved in the axial direction. Further, when the side bending posture is taken, the change in length of the two rows of sensors A is different, so that the control device B drives the above-described step motor based on the difference in the change in resistance value. The tip portion of the outer pipe 1211 is swung.

  The control for driving the linear motor or the like by the control device B can use proportional control, differential control, integral control, or a combination thereof with respect to the output signal of the sensor A. Furthermore, a switch can be provided on the wrist or the like to manually drive the linear motor or the like.

  19 and 20 is not limited to the muscle strength assisting device having the configuration shown in FIG. 7, but the muscle strength assisting device having another configuration, for example, the muscle strength shown in FIGS. 8 to 10. Can be easily applied to assistive devices.

  In addition to bending forward, agriculture can effectively reduce the burden on muscles etc. in any posture such as tilting the upper body to the side, rotating it, turning it back, or lifting the arm. It can be widely used in other industries related to forestry, fisheries, transportation, manufacturing, or rehabilitation.

DESCRIPTION OF SYMBOLS 1, 1011-1201 Strength support tool 11, 111-611, 1111-1211 Outer pipe 12, 112-612, 812 Inner member 13, 113-613 Elastic member 702, 802-1202 Locking tool 1124 Cylinder part (moving means)
1126 Ratchet mechanism (moving means)
1227 Step motor (electric motor)
1228 Cylinder part (electric motor)
1229 Piston part (electric motor)
A Strain-in gauge (sensor)
Control device with B battery

Claims (8)

It is worn between two places where the distance changes due to the movement of the human body on the surface of the human body,
An outer pipe made of a material having elasticity in the bending direction, a rod-like inner member slidably inserted into the outer pipe, and an elastic member connected to the outer pipe and the inner member,
The elastic member generates a tensile force or a compressive force opposite to the direction of the movement when the inner member moves in the direction of exiting the outer pipe or the direction of entering the outer pipe,
The muscle strength assisting device according to claim 1, wherein the distal end portion of the outer pipe and the distal end portion of the inner member are latched at the two positions via a latch provided on the surface of the human body. 2. The muscle strength according to claim 1, wherein at least one of the locking tools provided at the two locations restrains the tip portions of the outer pipe and the inner member in the axial direction and the tilting direction, respectively. Auxiliary tool. Any one of the locking tools provided at the two locations is configured such that when an axial force or bending force exceeding a preset value is applied to the outer pipe or the inner member, the outer pipe locked to the locking tool. Or a moving means for moving the distal end portion of the inner member in the axial direction or in the falling direction;
The muscle force assisting tool according to claim 1 or 2, wherein the moving means uses a frictional force or a spring force acting on the tip portion or the locking tool. Any one of the locking tools provided at the two locations has an electric motor that moves the tip portion of the outer pipe or the inner member in the axial direction and the tilting direction,
Furthermore, a sensor that measures the expansion and contraction of the surface of the human body, a control device, and a power source that supplies power to the electric motor, sensor, and control device,
The muscle force assisting device according to claim 1, wherein the control device controls driving of the electric motor based on a signal from the sensor. It is worn between two places where the distance changes due to the movement of the human body on the surface of the human body,
Each includes an outer pipe made of a material having elasticity in the bending direction, two rod-like inner members slidably inserted into the outer pipe, and an elastic member that interconnects the two rod-like inner members. ,
The elastic member generates a tensile force or a compressive force opposite to the moving direction when the two rod-shaped inner members move in the axial direction and away from or approach each other.
Both end portions of the two rod-shaped inner members are locked at the two positions via locking tools provided on the surface of the human body, respectively. It is worn between two places where the distance changes due to the movement of the human body on the surface of the human body,
An outer pipe made of a material having elasticity in the bending direction, two rod-like inner members slidably inserted into the outer pipe, and an elasticity for connecting the two rod-like inner members to the outer pipe, respectively. Comprising a member,
The elastic member generates a tensile force or a compressive force opposite to the moving direction when the two rod-shaped inner members move in the axial direction and away from or approach each other.
Both end portions of the two rod-shaped inner members are locked at the two positions via locking tools provided on the surface of the human body, respectively. The muscle strength assisting device according to any one of claims 1 to 6, wherein the outer pipe and the inner member are each formed of fiber reinforced plastic, and the elastic member is formed of a tube made of a rubber material. The two locations on the surface of the human body are respectively the back side of the back and the thigh, the upper and lower parts of the knee, the head and shoulders, or the upper arm and lower back. 7. The muscle strength assisting device according to 7.

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